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#include <stdlib.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/semphr.h>
#include <esp_timer.h>
#include <esp_log.h>
#include "eos.h"
#include "cell.h"
#include "at_cmd.h"
static const char *TAG = "EOS ATCMD";
typedef struct ATURCItem {
regex_t re;
at_urc_cb_t cb;
char pattern[AT_SIZE_PATTERN];
} ATURCItem;
typedef struct ATURCList {
ATURCItem item[AT_SIZE_URC_LIST];
int len;
} ATURCList;
static ATURCList urc_list;
static SemaphoreHandle_t mutex;
static char at_buf[EOS_CELL_UART_SIZE_BUF];
/* should be used from net cell handlers only! */
char at_cmd_buf[AT_SIZE_CMD_BUF];
void at_init(void) {
memset(&urc_list, 0, sizeof(ATURCList));
mutex = xSemaphoreCreateBinary();
xSemaphoreGive(mutex);
}
int at_urc_process(char *urc) {
regmatch_t match[AT_SIZE_NMATCH];
at_urc_cb_t cb = NULL;
int i;
if (urc[0] == '\0') return 0;
xSemaphoreTake(mutex, portMAX_DELAY);
for (i=0; i<urc_list.len; i++) {
if (regexec(&urc_list.item[i].re, urc, AT_SIZE_NMATCH, match, 0) == 0) {
cb = urc_list.item[i].cb;
break;
}
}
xSemaphoreGive(mutex);
if (cb) {
cb(urc, match);
ESP_LOGI(TAG, "URC Processed: %s", urc);
return 1;
}
ESP_LOGI(TAG, "URC NOT Processed: %s", urc);
return 0;
}
int at_urc_insert(char *pattern, at_urc_cb_t cb, int flags) {
int r;
int rv = EOS_OK;
if (strlen(pattern) >= AT_SIZE_PATTERN) return EOS_ERR;
xSemaphoreTake(mutex, portMAX_DELAY);
r = regcomp(&urc_list.item[urc_list.len].re, pattern, flags);
if (r) rv = EOS_ERR;
if (!rv && (urc_list.len == AT_SIZE_URC_LIST)) rv = EOS_ERR_FULL;
if (!rv) {
strcpy(urc_list.item[urc_list.len].pattern, pattern);
urc_list.item[urc_list.len].cb = cb;
urc_list.len++;
}
xSemaphoreGive(mutex);
return rv;
}
int at_urc_delete(char *pattern) {
int i;
int rv = EOS_ERR_NOTFOUND;
xSemaphoreTake(mutex, portMAX_DELAY);
for (i=0; i<urc_list.len; i++) {
if ((strcmp(pattern, urc_list.item[i].pattern) == 0)) {
regfree(&urc_list.item[i].re);
if (i != urc_list.len - 1) memmove(&urc_list.item[i], &urc_list.item[i + 1], (urc_list.len - i - 1) * sizeof(ATURCItem));
urc_list.len--;
memset(&urc_list.item[urc_list.len], 0, sizeof(ATURCItem));
rv = EOS_OK;
break;
}
}
xSemaphoreGive(mutex);
return rv;
}
void at_cmd(char *cmd) {
eos_modem_write(cmd, strlen(cmd));
ESP_LOGI(TAG, "Cmd: %s", cmd);
}
int at_expect(char *str_ok, char *str_err, uint32_t timeout) {
return at_expect_match(str_ok, str_err, NULL, NULL, 0, REG_EXTENDED, timeout);
}
int at_expect_match(char *str_ok, char *str_err, char **buf, regmatch_t match[], size_t match_size, int flags, uint32_t timeout) {
int rv;
regex_t re_ok;
regex_t re_err;
uint32_t e = 0;
uint64_t t_start = esp_timer_get_time();
if (str_ok) {
rv = regcomp(&re_ok, str_ok, flags);
if (rv) {
return EOS_ERR;
}
}
if (str_err) {
rv = regcomp(&re_err, str_err, flags);
if (rv) {
if (str_ok) regfree(&re_ok);
return EOS_ERR;
}
}
if (buf) *buf = at_buf;
do {
rv = eos_modem_readln(at_buf, sizeof(at_buf), timeout ? timeout - e : 0);
if (rv) {
if (str_ok) regfree(&re_ok);
if (str_err) regfree(&re_err);
return rv;
}
if (strlen(at_buf)) ESP_LOGI(TAG, "Expect: %s", at_buf);
if (str_ok && (regexec(&re_ok, at_buf, match_size, match, 0) == 0)) {
regfree(&re_ok);
if (str_err) regfree(&re_err);
return 0;
}
if (str_err && (regexec(&re_err, at_buf, match_size, match, 0) == 0)) {
if (str_ok) regfree(&re_ok);
regfree(&re_err);
return 1;
}
at_urc_process(at_buf);
e = (uint32_t)(esp_timer_get_time() - t_start) / 1000;
if (timeout && (e > timeout)) {
if (str_ok) regfree(&re_ok);
if (str_err) regfree(&re_err);
return EOS_ERR_TIMEOUT;
}
} while (1);
}
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